Sunderland have beaten Manchester United 2-1 in the first leg of the League Cup semi-final at the Stadium of Light - making it United's third straight loss.
Fabio Borini scored a second-half penalty to give the Premier League's bottom club a one-goal lead ahead of the return match at Old Trafford on January the 23rd.
A 52nd minute Nemanja Vidic header had cancelled out Ryan Giggs's own goal in first-half stoppage time.
The loss follows United's defeat in the FA Cup third round by Swansea City, and by Tottenham Hotspur in the Premier League last week.
The Red Devils have not lost three games in a row since 2001.
Manchester City host West Ham United in the first leg of the other semi-final tomorrow.